腰椎间盘突出症
参考答案：腰椎间盘突出症是指腰椎间盘变性、纤维环破裂，髓核组织突出，刺激或压迫马尾神经根所引起的一种综合征。
It was the third time that I _______of the changes of the timetable.
A．had informed
B．has informed
C．had been informed
D．has been informed
新闻编辑学
